<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>赋值和复合运算符</title>
    <script type="text/javascript">
        var var_01=1;
        console.log(var_01);
        var var_02;
        var_02=var_03=3;
        console.log(var_02,var_01);
        var_02+=4;
        console.log(var_02);
        var_01*=3+1*2;         //var_01=var_01*(3+1*2)
        console.log(var_01);
    </script>
</head>
<body>

</body>
</html>